package com.itheima.service;

import com.alibaba.dubbo.config.annotation.Reference;
import com.itheima.pojo.Permission;
import com.itheima.pojo.Role;
import com.itheima.pojo.User;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.core.userdetails.UsernameNotFoundException;
import org.springframework.stereotype.Component;

import java.util.ArrayList;
import java.util.List;
import java.util.Set;

@Component
public class SpringSecurityUserService  implements UserDetailsService {
    @Reference
    private UserService userService;

    @Override
    public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
        // 获取用户对象,这个对象包含角色和对应的权限
        User user = userService.findByUsername(username);

        if (user == null) {
            return null;
        }
        // 创建权限列表
        List<GrantedAuthority> list = new ArrayList<>();

//        设置用户得权限
        Set<Role> roles = user.getRoles();
        for (Role role : roles) {
            // 添加角色
            list.add(new SimpleGrantedAuthority(role.getKeyword()));
            // 遍历对应的权限
            Set<Permission> permissions = role.getPermissions();
            for (Permission permission : permissions) {
                // 添加权限
                list.add(new SimpleGrantedAuthority(permission.getKeyword()));
            }
        }
        return new org.springframework.security.core.userdetails.User(username,user.getPassword(),list);
    }
}
